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Posted: 7/30/2011 1:30:03 PM EDT
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I'd been struggling with my Spikes ST-22 for the last two years (long story). After Spikes chose to discontinue them, I chose to dump it. . . and I've never been happier. I bought a stainless CMMG conversion kit + three mags and just finished my first range session. It ate, reliably, every type of 22lr I have on hand, including Federal Bulk Pack. This was my first conversion unit (my Spikes was dedicated), and it was an absolute pleasure to shoot.
The entire assembly seemed to be beefy and exceptionally well made. It had a true feel of quality in the hand. I ran it in a Spikes 16" middie upper 1:7 twist. I ran the three mags that I bought five times each loaded down to 20 each for a total of 300 perfect rounds down range. The bolt's lock up was solid; strikes were solid; and ejections were exceptionally consistent. It functioned flawlessly. Accuracy was about what I expected for cheap ammo and a 1:7 barrel. 1.5" five shot groups at 25 yds. was about the best I could do from a rest with an Aimpoint M3 and the Federal bulk. I didn't expect much better than this, so I'm not concerned. It's plenty for plinking and cheap extra trigger time with an AR. After the 300 rounds, I plugged the original bcg back in and ran 20 rounds through. Using the kit seemed to have had no effect on accuracy or reliablity of the rifle. I couldn't be more pleased. I need to get another one or two kits just because. Excellent piece of equipment. I couldn't be happier. Thank you to Shadowcop for helping me in this direction! |
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I guess I was a lucky one with the Spike's 22's. I must have been shooting for them when they had
their best parts supplier. Now CMMG's at the top of the game and shooting for them, testing their New Evolution System has been great. Although I had a conversion from them years ago and it ran as perfect as their much more advanced kits do today... Congrats on your new CMMG Kit..you'll have a lifetime of enjoyment. I'm sure that if you buy several more, you'll be just as happy with them too. 
The Other Dave, in Florida |
| I couldn't be happier with my stainless kit. Even though hitting six inch plates every shot at 100 yards does get old after a while. Everyone talks about accuracy issues with these kits. I just don't see the problem unless you are looking to put all your bullets in the same hole. |
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Quoted:
I couldn't be happier with my stainless kit. Even though hitting six inch plates every shot at 100 yards does get old after a while. Everyone talks about accuracy issues with these kits. I just don't see the problem unless you are looking to put all your bullets in the same hole. I'm sure the kit is plenty accurate. My 1:7 barrel is the issue. With a proper twist, I bet it would dot the I's. It runs as advertised and I'm happy. I'm yet to try it at 100. Though I doubt I could keep it inside 6" at that distance. 1.5 at 25 was my best effor....and I'm a much better shot than that. |
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I am running a couple of old school parkerised Ceiners and can't bring myself to spend the coin for a dedicated upper.
I have handled the CMMG stainless units and certainly would go that way now as they seem to be top shelf. I put a upper together with an old 12 twist pencil barrel that I found at a gunshow. I love the light weight and balance but surprisingly it shoots no better than my 1/9 twist bushmaster uppers. No worse but no better. I suspect the barrel is half beat but I don't know My best accuracy is with my RRNM which has a heavy match stainless barrel with I believe a 1/8 twist (or is it 1/7?) I shoot in a rimfire league @ 100yd and the standard velocity target ammo's do way better than any of the high velocity stuff . Now this rig doesn't hold a candle to the other match grade rimfire guns But I have got a couple of my buddies giving me a run for my money in our "AR Class" I just can not see anyone having a AR rifle and not grabbing one of these conversion kits |
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The sportsmans guide has the CMMG w/3 mags deal for $197 + shipping. Good price? I'm not sure if it's the stainless one or not. Stainless one better or not? I have both the parkerized one and a stainless one and both give excellent service. BUT, if I were buying a new one I would go with the Stainless Steel one. Sportsman guide.....I am not a fan of....but that is personal. |
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I'm considering buying the stainless kit but I want to make sure it will work with my trigger.
I have a rock river match trigger and I read somewhere that the CMMG likes a standard style hammer? Is this right? Anybody know if the CMMG kit will work with my trigger or not? I have a 1/9 twist barrell, so I think that will be ok. Maybe I'll just pony up and buy a dedicated upper 
Thanks! |
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I'm considering buying the stainless kit but I want to make sure it will work with my trigger. I have a rock river match trigger and I read somewhere that the CMMG likes a standard style hammer? Is this right? Anybody know if the CMMG kit will work with my trigger or not? I have a 1/9 twist barrell, so I think that will be ok. Maybe I'll just pony up and buy a dedicated upper
Thanks! The manual with mine says that a rounded hammer is preferred over a notched hammer. I have not tried mine with a notched hammer yet. |
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I have both rounded and notched. Unfortunately you won't know until you try it. Mine works with both.
My RRA 2 stage broke in half after 8000 rounds of .22 Know that the kits you see for $160 are the older, discontinued kits and do not have the features of the updated Evolution kits including no live round extraction. That is why they are cheap. I get tired of seeing guys by these and then complain. Dave N |
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I have both rounded and notched. Unfortunately you won't know until you try it. Mine works with both. My RRA 2 stage broke in half after 8000 rounds of .22 Know that the kits you see for $160 are the older, discontinued kits and do not have the features of the updated Evolution kits including no live round extraction. That is why they are cheap. I get tired of seeing guys by these and then complain. Dave N You just did me a service. I have been researching building my own upper with the CMMG dedicated barrel and collar + SS kit from CDNN vs buying a Sierra upper. Now I see why I need the complete upper. Eventually I may also want to add a FA although I rarely use it on my other AR's. Thanks! |
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Quoted:
I have both rounded and notched. Unfortunately you won't know until you try it. Mine works with both. My RRA 2 stage broke in half after 8000 rounds of .22 Know that the kits you see for $160 are the older, discontinued kits and do not have the features of the updated Evolution kits including no live round extraction. That is why they are cheap. I get tired of seeing guys by these and then complain. Dave N So the standard stainless kits sold by Midway don't have live round extraction? I see they still sell the standard kits on the CMMG website, didn't know they were discontinued. I don't see any of the Evolution kits with 10 rnd mags required in my state. |
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Quoted:
Quoted:
I have both rounded and notched. Unfortunately you won't know until you try it. Mine works with both. My RRA 2 stage broke in half after 8000 rounds of .22 Know that the kits you see for $160 are the older, discontinued kits and do not have the features of the updated Evolution kits including no live round extraction. That is why they are cheap. I get tired of seeing guys by these and then complain. Dave N You just did me a service. I have been researching building my own upper with the CMMG dedicated barrel and collar + SS kit from CDNN vs buying a Sierra upper. Now I see why I need the complete upper. Eventually I may also want to add a FA although I rarely use it on my other AR's. Thanks! Get the forward assist when you buy it the first time. The only way to get it after your purchase is to replace the rail. Dave N |
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The live round extraction is accomplished with the collar or adapter. While pictures look the same, the collar/adapter is machined differently.
Dave N Quoted:
Quoted:
I have both rounded and notched. Unfortunately you won't know until you try it. Mine works with both. My RRA 2 stage broke in half after 8000 rounds of .22 Know that the kits you see for $160 are the older, discontinued kits and do not have the features of the updated Evolution kits including no live round extraction. That is why they are cheap. I get tired of seeing guys by these and then complain. Dave N So the standard stainless kits sold by Midway don't have live round extraction? I see they still sell the standard kits on the CMMG website, didn't know they were discontinued. I don't see any of the Evolution kits with 10 rnd mags required in my state. |
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Quoted:
The live round extraction is accomplished with the collar or adapter. While pictures look the same, the collar/adapter is machined differently. Dave N Quoted:
Quoted:
I have both rounded and notched. Unfortunately you won't know until you try it. Mine works with both. My RRA 2 stage broke in half after 8000 rounds of .22 Know that the kits you see for $160 are the older, discontinued kits and do not have the features of the updated Evolution kits including no live round extraction. That is why they are cheap. I get tired of seeing guys by these and then complain. Dave N So the standard stainless kits sold by Midway don't have live round extraction? I see they still sell the standard kits on the CMMG website, didn't know they were discontinued. I don't see any of the Evolution kits with 10 rnd mags required in my state. OK, here we go again. Let's say I have a SS conversion and a flattop upper laying around. I dont care about forward assist. I can go to CMMG and buy a barrel with the SS collar. I slap it together. I am now gtg with everything except FA and BHOA, correct? Because live round extraction and go-no go collar is a win for me. I will add BHOA later. The reason I am trying to be crystal clear is because I want to pull the trigger on this baby. I would just pick up a complete upper but I prefer not to add another set of HG's and a useless gas block to my pile of parts when I customize it. Sorry for beating the horse corpse. |
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Quoted:
I guess I was a lucky one with the Spike's 22's. I must have been shooting for them when they had their best parts supplier. Now CMMG's at the top of the game and shooting for them, testing their New Evolution System has been great. Although I had a conversion from them years ago and it ran as perfect as their much more advanced kits do today... Congrats on your new CMMG Kit..you'll have a lifetime of enjoyment. I'm sure that if you buy several more, you'll be just as happy with them too.
The Other Dave, in Florida Mine had troubles when I first got the conversion. The early kits had very tight chambers because they did not account for the change in tolerances after hard chroming. When I called Spikes, they sent me a new chamber adapter free of charge. It ran 100%. After that I go a dedicated upper using my conversion bolt with a new barrel collar. It has performed 100% so far. After break-in, I have not had a single malfunction aside from squibs. I am using Federal value pack and CCI mini-mags with BDM mags. Too bad Spike's no longer makes them. Their stuff was great with customer service to match. |
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Quoted:
I couldn't be happier with my stainless kit. Even though hitting six inch plates every shot at 100 yards does get old after a while. Everyone talks about accuracy issues with these kits. I just don't see the problem unless you are looking to put all your bullets in the same hole. Acceptable accuracy is kind of relative. My anschutz target rifles shoot 1/4"-1/2" groups at 50 yards with $12 per box ely ammo. At the same distance my ar with a conversion kit shoots 3"-4" groups with cheap bulk ammo. So I don't consider it accurate. But its kind of unfair to compare a $150 conversion kit with a $1,500 rifle. I didn't buy the kit to compete with. |
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