18" SPR Barrel - Back in Stock 4/14! (Page 2 of 5)
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Originally Posted By NachoDip: Ideally in the 16" with 5/8x24 thread pattern. @GACS Originally Posted By NachoDip: Originally Posted By TheGunslinger: Any more barrels coming?  @GACS Ideally in the 16" with 5/8x24 thread pattern. @GACS  I think I'd want a 16", but after talking to knightschneider yesterday about how soft his rifle shot, and to a buddy with an ammo company today, I'm really looking forward to the 18" and testing some 85gr through it. I'd probably still buy a 16" though
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Originally Posted By spyderboy03: @GACS I think I'd want a 16", but after talking to knightschneider yesterday about how soft his rifle shot, and to a buddy with an ammo company today, I'm really looking forward to the 18" and testing some 85gr through it. I'd probably still buy a 16" though Moar info on that ammo please. |
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So long now! Super gas block arrived today. I should have known USPS wouldn't get it here on Saturday. They don't get anything to NW MT on time. The G SGB is definitely the best fit of the set screw gas blocks I have on hand. The VLTOR clamp is honestly tighter (without the screws in) and appeared like everything lined up well. I do really like the indexing pin with the SBG and that also makes this rifle pretty much completely Geissele aside from mag release and safety selector. I'll need to get a shorter screw for my bipod, or try moving it back a little as it is very easy to flex the MK14 so the back screw touches the gas block. Super excited to get this out to the range! Attached File Attached File Attached File |
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Originally Posted By spyderboy03: So long now! Super gas block arrived today. I should have known USPS wouldn't get it here on Saturday. They don't get anything to NW MT on time. The G SGB is definitely the best fit of the set screw gas blocks I have on hand. The VLTOR clamp is honestly tighter (without the screws in) and appeared like everything lined up well. I do really like the indexing pin with the SBG and that also makes this rifle pretty much completely Geissele aside from mag release and safety selector. I'll need to get a shorter screw for my bipod, or try moving it back a little as it is very easy to flex the MK14 so the back screw touches the gas block. Super excited to get this out to the range! https://www.ar15.com/media/mediaFiles/57550/1000003924_jpg-3487453.JPG https://www.ar15.com/media/mediaFiles/57550/1000003926_jpg-3487454.JPG https://www.ar15.com/media/mediaFiles/57550/1000003925_jpg-3487455.JPG Looks great! My gas block is sitting in a distribution center 10 miles from my house since 3/6 and says arriving late 
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Originally Posted By NachoDip: Ideally in the 16” with 5/8x24 thread pattern. @GACS Originally Posted By NachoDip: Originally Posted By TheGunslinger: Any more barrels coming? @GACS Ideally in the 16” with 5/8x24 thread pattern. @GACS There are definitely more barrels on the way! We cannot recommend enough signing up for the back-in-stock notifications on the SPR page. I have a link here: https://geissele.com/geissele-spr-barrel.html We do not have a firm ETA quite yet, but we can say that we are actively working on getting more 18" barrels made. We do not have 16" barrels as an option, but with the attention these barrels are getting, we are pushing all feedback to our project teams as quickly as possible. If we come out with other variants we will update the thread! |
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@GACS do you have any suggestions on where to find a gas block? Im afraid my adco ordered one is gone. I'm really not wanting to experiment with other brands on this, but this is the *only* component I'm waiting on. Thanks! Also, if you have any break in suggestions, I'd appreciate it. |
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Originally Posted By Marksman14: @GACS do you have any suggestions on where to find a gas block? Im afraid my adco ordered one is gone. I'm really not wanting to experiment with other brands on this, but this is the *only* component I'm waiting on. Thanks! Also, if you have any break in suggestions, I'd appreciate it. We are working with our assembly team to try and get a better ETA and see when they will be available again. If any dealers get new shipments we will try and get an update here as well. |
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Originally Posted By GACS: We are working with our assembly team to try and get a better ETA and see when they will be available again. If any dealers get new shipments we will try and get an update here as well. Managed to locate one at tactical link. Not thrilled about having to order two of these but hey, shit happens
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So while these barrels aren't clone correct, I'm only trying to build a Mk12-ish Mod 0 and this barrels is of great interest to me. Would the PRI flip-up front sight gas block offer enough meat for the Phased Array gas system? 
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Originally Posted By Plumber576: So while these barrels aren't clone correct, I'm only trying to build a Mk12-ish Mod 0 and this barrels is of great interest to me. Would the PRI flip-up front sight gas block offer enough meat for the Phased Array gas system? https://www.precisionreflex.com/247-large_default/pri-flip-up-front-sight-with-750-crossbolt.jpg My opinion. Yes. But hot damn it will be close. |
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Originally Posted By NachoDip: My opinion. Yes. But hot damn it will be close. Originally Posted By NachoDip: Originally Posted By Plumber576: So while these barrels aren't clone correct, I'm only trying to build a Mk12-ish Mod 0 and this barrels is of great interest to me. Would the PRI flip-up front sight gas block offer enough meat for the Phased Array gas system? https://www.precisionreflex.com/247-large_default/pri-flip-up-front-sight-with-750-crossbolt.jpg My opinion. Yes. But hot damn it will be close. |
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Originally Posted By Plumber576: So while these barrels aren't clone correct, I'm only trying to build a Mk12-ish Mod 0 and this barrels is of great interest to me. Would the PRI flip-up front sight gas block offer enough meat for the Phased Array gas system? https://www.precisionreflex.com/247-large_default/pri-flip-up-front-sight-with-750-crossbolt.jpg This is a great question, although we do not have one on hand we can see if we can get some basic measurements for you! |
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Got out today. Only put about 40 rounds through it. Bipod with no rear support. I'm excited to see see this continue getting better! Bone Frog 77gr Barnes Match Burner (rounds 26-30) Attached File Hornady Match 73gr ELD (rounds 36-40) Attached File My load of 69gr RMR over 23.4gr of Shooter's World Tactical Rifle in mixed brass and no special prep. This was rounds 16-20 Attached File |
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Originally Posted By NachoDip: Let's get some 10 shot groups going. You got this b On another note, the barrel is gassed beautifully. Very smooth cycling with my 30 cal Resonator K, zero gas to the face, and about 3:30 ejection. I'll pull the rail this weekend to see if there was any gas leakage. |
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40 ish suppressed rounds, new barrel, gas block, and gas tube. Gas block need a light tap with a hammer and delrin punch to get off. Attached File Attached File Attached File Attached File |
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Attached File Dimensions from start of gas journal to start and end of phased array channel. Attached File Attached File |
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Thank you for posting some measurements, we were looking to see if we happen to have that gas block on another rifle in our inventory, but were unable to find one. If anyone can locate dimensions for the PRI Flip Up we can see if they are compatible, but just from a first glance we also believe it is going to be CLOSE. |
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After sitting in USPS purgatory for two weeks, my original gas block arrived. The replacement, which was supposed to be delivered yesterday, got routed from a close distribution center to a completely different state. USPS also severely delayed a tripod adapter........so my last 3/3 experiences with them have been garbage. Alas, here she is. Assuming she shoots BH 77 OTM well, this will be a work rifle replacing an upper with a Centurion 18" SPR barrel. So, I swear this is the last time I will ask this, but I haven't gotten an answer yet. Is there *any* recommended break in procedure for these barrels? Attached File Attached File |
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Originally Posted By Marksman14: After sitting in USPS purgatory for two weeks, my original gas block arrived. The replacement, which was supposed to be delivered yesterday, got routed from a close distribution center to a completely different state. USPS also severely delayed a tripod adapter........so my last 3/3 experiences with them have been garbage. Alas, here she is. Assuming she shoots BH 77 OTM well, this will be a work rifle replacing an upper with a Centurion 18" SPR barrel. So, I swear this is the last time I will ask this, but I haven't gotten an answer yet. Is there *any* recommended break in procedure for these barrels? https://www.ar15.com/media/mediaFiles/6045/IMG_2335_jpeg-3493913.JPG https://www.ar15.com/media/mediaFiles/6045/IMG_2336_jpeg-3493914.JPG  There isn't consensus from any of the major manufacturers or shooters on this, so I'm rolling with cleaning after my first slow 40 rounds and I'll clean again when groups open up or every 300-500 rounds or so. |
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Originally Posted By spyderboy03: There isn't consensus from any of the major manufacturers or shooters on this, so I'm rolling with cleaning after my first slow 40 rounds and I'll clean again when groups open up or every 300-500 rounds or so. Just bump fire a few hundred though it and get it nice and broken in. |
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Originally Posted By spyderboy03: There isn't consensus from any of the major manufacturers or shooters on this, so I'm rolling with cleaning after my first slow 40 rounds and I'll clean again when groups open up or every 300-500 rounds or so. Yeah, thats why I was hoping for some guidance from the mothership. My KAC 6.5 22" break in procedure as outlined from KAC was basically to sacrifice a goat, summon a shaman, raindance in between cleanings and then complete a rubix cube while naked underwater in a straight jacket. It was quite involved. But the end result is that its an *absolute* hammer. Most accurate gasser I've ever shot. I'd hate to miss an opportunity to have the G barrel perform the same if they have something they recommend! I also have access to an indoor range that I can complete the break in at, rather than lugging everything to the outdoor range etc. |
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Originally Posted By Marksman14: Yeah, thats why I was hoping for some guidance from the mothership. My KAC 6.5 22" break in procedure as outlined from KAC was basically to sacrifice a goat, summon a shaman, raindance in between cleanings and then complete a rubix cube while naked underwater in a straight jacket. It was quite involved. But the end result is that its an *absolute* hammer. Most accurate gasser I've ever shot. I'd hate to miss an opportunity to have the G barrel perform the same if they have something they recommend! I also have access to an indoor range that I can complete the break in at, rather than lugging everything to the outdoor range etc.  I can understand that.
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Originally Posted By Marksman14: After sitting in USPS purgatory for two weeks, my original gas block arrived. The replacement, which was supposed to be delivered yesterday, got routed from a close distribution center to a completely different state. USPS also severely delayed a tripod adapter........so my last 3/3 experiences with them have been garbage. Alas, here she is. Assuming she shoots BH 77 OTM well, this will be a work rifle replacing an upper with a Centurion 18" SPR barrel. So, I swear this is the last time I will ask this, but I haven't gotten an answer yet. Is there *any* recommended break in procedure for these barrels? https://www.ar15.com/media/mediaFiles/6045/IMG_2335_jpeg-3493913.JPG https://www.ar15.com/media/mediaFiles/6045/IMG_2336_jpeg-3493914.JPG OK, after speaking with our Gunsmiths they recommended the following break in procedure for our Stainless Barrels. - 2 rounds - full clean with boretech eliminator - 5 patches - 15 swipes with a nylon brush - 5 patches and let sit for 5-10 min - Dry patch, then finish with a couple CLP patches - 7 rounds- full clean process again Then generally we shoot 4 x groups, the last group would be a good indication (based on shooter level) of what that barrel will shoot with that ammo. |
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Originally Posted By Justin-Beard: I am ecstatic they went with 5/8-24 for the muzzle. I don't know why more manufacturers don't use the fatter thread with heavier barrels... 1/2-28 was spec'd for the A1 and it's pencil barrel, and is inappropriate for heavier profiles IMHO. My SOCOM can is a 762-mini, so it works for me as well. Id like to Geissele come out with a URG-i type upper with this barrel in the future, which is exactly how I plan to build it. |
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Originally Posted By GACS: OK, after speaking with our Gunsmiths they recommended the following break in procedure for our Stainless Barrels. - 2 rounds - full clean with boretech eliminator - 5 patches - 15 swipes with a nylon brush - 5 patches and let sit for 5-10 min - Dry patch, then finish with a couple CLP patches - 7 rounds- full clean process again Then generally we shoot 4 x groups, the last group would be a good indication (based on shooter level) of what that barrel will shoot with that ammo. Thank you! Very simple break in, I like it!! |
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Last Friday I got the barrel up to 100 rounds and zeroed it for a factory 85gr Nosler RDF load. Was shooting consistent 1" groups with my Diligent Defense Enticer S (so quiet!). I then shot my first precision match ever on Saturday. The 85gr Nosler RDF has a pretty dang high BC and at 2,638 FPS, the holds were not bad. 3.1 mils at 500, 5.4 at 700, etc. I was the only shooter of 62 shooting a gas gun and .223 . I think I placed 45th overall which doesn't seem too bad considering I've never shot past 600 yards or so, and that has all been at large steel. This match had mostly 1.5-3 MOA targets with the closest target being 311 yards and the furthest being 1,280 yards. Wind was calm for the first few stages (total of 8), then bumped to 7-10 mph with gusts over 17 mph. Each stage had 4 targets and each target required 2-3 shots. I did make hits at 852 yards when it was clam, as well as 945 and 980 with a 7-10 mph wind (from 10-10:30). Drops from my Chairgun Elite were spot on even at 1,280 yards. I didn't hit it, but the spot said all my misses had good elevation but were wide in the direction the wind was blowing. All the different positions were hard to stabilize for me. In the end I had 19 of 75 hits. Definitely reflects on my ability, not the rifle or even ammo I don't think. So, yesterday I cleaned the barrel and took a few factory loads as well as a couple load ladders with me to the indoor range. Had a better setup and made a makeshift mirage shield (worked pretty well!). The 85gr load didn't shoot as well again last night, but I had some decent results. The barrel did not like Hornady Match 73gr or FGMM 73gr Bergers. It shot a .855" 5-shot group with 52gr SMK's and a random load of Staball Match that had an average velocity of 3,020 FPS. It did like Hornady Match 75gr (which is slow) and the Bone Frog 77gr. Setup Attached File 52gr SMK Attached File Hornady Match 75gr (white box) .625" Attached File Bone Frog 77gr .710" Attached File |
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Originally Posted By Shlouf: @GACS Any ETA on next batch of barrels? We usually do not have any ETAs on out of stock products since most of our products are a combination of parts. Barrels can be a little more straight forward since we make them in house and they are an individual item. We will send our production team a message and hopefully we can get you an ETA. We know they are actively being worked on though. |
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Originally Posted By GACS: We usually do not have any ETAs on out of stock products since most of our products are a combination of parts. Barrels can be a little more straight forward since we make them in house and they are an individual item. We will send our production team a message and hopefully we can get you an ETA. We know they are actively being worked on though. Fingers crossed for a 16" middy!!! |
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@GACS Buffer recommendations? I’m using all G parts with an H2 and the rifle will cycle but not lock. My factory gas block felt to me to be possibly on the looser side, but it was the only one I had available during the build. By loose, I mean no resistance when sliding it in place, but not “wobble” so to speak. If it’s supposed to be locking back reliably with an H2 or H3 buffer, then I will swap the gas block. If however, the recommendation is to use an H1 buffer, I will try that first. Rifle is not suppressed. Ammo black hills 556 77 OTM. Normally I’d have time to trouble shoot, but I’m hoping to have this solved for wednesdays range trip and make sure my Loctite has 24 hours to set. |
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Tried the H1 today. First round of PMC locked back so I figured I was good. I wasn’t. It would run fine with either PMC or BH, then randomly fail to strip a round from the magazine. Usually these things are all or nothing, I’ve never had one go at random like this. Going to try a different BCG, then it will be on to the gas block. Given how loose mine was with zero resistance on the gas block journal, my gut tells me that’s what it is. |
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Originally Posted By Marksman14: Tried the H1 today. First round of PMC locked back sometimes I figured I was good. I wasn't. It would run fine with either PMC or BH, then randomly fail to strip a round from the magazine. Usually these things are all or nothing, I've never had one go at random like this. Going to try a different BCG, then it will be on to the gas block. Given how loose mine was with zero resistance on the gas block journal, my gut tells me that's what it is. |
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Originally Posted By spyderboy03: Is your BCG currently an REBCG? I've found them to be much more gas efficient than most others. Yes it is. I'm trying a different REBCG at the recommendation of CS that I spoke to. The barrel is absolutely amazingly accurate though...its currently perfectly zeroed so I'm *really* hoping its the BCG versus the block even though I truly don't believe it is. |
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Originally Posted By Marksman14: Yes it is. I'm trying a different REBCG at the recommendation of CS that I spoke to. The barrel is absolutely amazingly accurate though...its currently perfectly zeroed so I'm *really* hoping its the BCG versus the block even though I truly don't believe it is. ETA: I'll be interested to know if a different REBCG works though! |
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Originally Posted By spyderboy03: With how loose your gas block sounds, I can see that being the cause until carbon seals it or you swap it. ETA: I'll be interested to know if a different REBCG works though! Yeah, I was hoping the H1 buffer in conjunction with some good old fashioned carbon would have done it....but unfortunately not the case. Range is almost an hour away. Looks like tomorrow is going to be 2 hours and 10 minutes to drive there and back and fire 30 rounds of PMC with the swapped BCG. Hoping its not going to be a waste of 30 rounds, gas, and time, but I'm fully prepared for it to be
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Originally Posted By Marksman14: Yeah, I was hoping the H1 buffer in conjunction with some good old fashioned carbon would have done it....but unfortunately not the case. Range is almost an hour away. Looks like tomorrow is going to be 2 hours and 10 minutes to drive there and back and fire 30 rounds of PMC with the swapped BCG. Hoping its not going to be a waste of 30 rounds, gas, and time, but I'm fully prepared for it to be |
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Originally Posted By TheGunslinger: What buffer spring are you using? Geissele super 42 carbine spring. FYI right side of the barrel in front of the block shows signs of leakage. Left side and bottom are clean. Round count is maybe 40-50 rounds. Still thinking its the block, but I also confirmed the BCG I put in this build was my new one, so it had never been tested. I put in my spare, which has been used and is verified good to go. Probably won't make it to the range today. |
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Originally Posted By spyderboy03: https://www.ar15.com/media/mediaFiles/57550/1000003989_jpg-3492272.JPG Dimensions from start of gas journal to start and end of phased array channel. https://www.ar15.com/media/mediaFiles/57550/1000003991_jpg-3492273.JPG https://www.ar15.com/media/mediaFiles/57550/1000003992_jpg-3492274.JPG After looking at these photos and given that you were shooting suppressed with no leakage out the front of the block, I'm going with its the gas block. Probably will just pull it today and re-build. |
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Originally Posted By Marksman14: After looking at these photos and given that you were shooting suppressed with no leakage out the front of the block, I'm going with its the gas block. Probably will just pull it today and re-build. |
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Originally Posted By spyderboy03: Hearing how loose yours is, that's where my mind goes. Did you test the fit of both the Geissele blocks you got, or just the first one that showed up? As soon as the first one showed up after being "lost" for a week or so in the mail, I built it. It got here before the "replacement" did so I never got to try it. ETA, it’s the block. Attached File Attached File Attached File Attached File Way more carbon than I thought, and tons more than other posted photos. ETA again: New one spins just as easy as the only one. Contacted CS and they suggested a warranty claim. I probably should have just started there but with this being a limited item in only a few people's hands, I was hoping it was something I simply over looked or a simple tolerance stacking issue. Special thanks to the folks on the phones over at Geissele. Top notch customer service, and hopefully I can get this thing up and running shortly! |