Warning

 

Close

Confirm Action

Are you sure you wish to do this?

Confirm Cancel
Member Login
Arrow Left Previous Page
Page / 2
Posted: 12/25/2005 6:32:45 PM EDT
What's the general consensus on the 11.5" uppers cycling reliably. I might have a deal on a bushmaster 11.5" but don't want to go through the hassle if they are nothing but problems. Any input from anyone with experience would be useful.
Link Posted: 12/25/2005 6:42:57 PM EDT
[Last Edit: 12/25/2005 7:01:41 PM EDT by Gunzilla]
they run fine with a suppressor... or course you really want a suppresor with one too.
Link Posted: 12/25/2005 6:46:26 PM EDT
I have one on my patrol carbine. Bushmaster's 11.5" run just fine.
Link Posted: 12/25/2005 6:46:26 PM EDT
One of my 14.5s atrted out life as an 11.5.It was in that configuration from 92 to 97 before it got rebarrelled.

In that time I never had a problem in function and cycling.You could see the muzzle blast in the day light and a hell of a shock when standing next to it while some one shoots..but no cycling problems.

I like the 11.5 but would only get one again if I could make it a true SBR thats when the ultra compact advantage is seen.
Link Posted: 12/25/2005 7:58:37 PM EDT
I have a 11.5" 1/7 BM H, bbl (fluted) on my pistol and it runs fine with or with out my Noveske FS. I wouldn't put it off. If that's what you want then get it. They seem to run fine. Mine has never ever had a fte or ftf. It has been 100% even with the "Wolf" stuff.
Link Posted: 12/25/2005 8:22:36 PM EDT
I've heard good things about the Bushy's..

If you are not dead set on it...

Maybe look into CMMG. I was told flat out that their uppers "just run" with any lower setup. That was enough to sell me on the 10.5" I got.

Now.. if this is an unbeatable deal, what are you waiting for???
Link Posted: 12/25/2005 9:29:19 PM EDT
Mine is not a Bushmaster but it works just fine. No problems as of yet.
Link Posted: 12/25/2005 11:42:52 PM EDT
Perfect!! I'm definetely gunna buy it then.
Link Posted: 12/26/2005 2:09:05 AM EDT
You'll like it. My 11.5/5.5 is my favorite carbine. Only reason I built it was because I liked the short barrel/long FS look they have. They are louder, or seem to me they are, and make a nice fireball that is very visible even in daylight.
Link Posted: 12/26/2005 2:29:01 AM EDT
Link Posted: 12/26/2005 2:32:56 AM EDT
[Last Edit: 12/26/2005 2:34:12 AM EDT by zunrj5]
Yes...I bought one before my deployment and it has served me fine. Now it's in the hands of one of my teammates since I got my L-W 10.5. He loves it too.

John

ETA: ...the L-W rocks!!!
Link Posted: 12/26/2005 3:48:26 AM EDT
I guess I'll be the dissenting voice...there's one in every crowd. The 11.5 produces less velocity, is louder and produces more flash that the 14.5 However, the overall length is still going to be 16". If looks are the primary issue, then heck yeah, go for it. If function is more important, I like the 14.5. The 11.5 has more potential to be less forgiving than the 14.5.
Link Posted: 12/26/2005 3:53:12 AM EDT
Where can I find a 11.5" barrel with 1:10 or 1:12 twist?
Link Posted: 12/26/2005 5:38:21 AM EDT
Look for a M16A1 barrel and have it cut down at ADCO.then try this sight www.isayeret and see what the israelis use that barrel legnth for ..it will surprise you.
Link Posted: 12/26/2005 5:51:56 AM EDT
Ive got one on my M16... I have zero problems.
Link Posted: 12/26/2005 6:54:58 AM EDT
Pun:
What do the Iraelis use (I don't want to pay $9.95/month to access the information) - length and twist?
Thanks
Link Posted: 12/26/2005 7:20:03 AM EDT
One of my Colt A1 11.5s is prone to dropped extraction, but runs 100% with a D ring. The other one doesn't need the ring. I run mine on 16s with standard A1 flashiders. My understanding is that a suppressor/moderator would increase time under pressurization such that extraction would be more reliable.

Sam
Link Posted: 12/26/2005 7:28:12 AM EDT
Anyone run an 11.5" Model 1 Sales upper with the A2 flash suppressor? Any comments?
Link Posted: 12/26/2005 7:42:58 AM EDT
My 10.5 pistol works with a car lemgth buffer pistol tube, so 11.5 will work all day long. Just do not use a heavy spring.
Link Posted: 12/27/2005 12:31:24 AM EDT
[Last Edit: 12/27/2005 12:31:49 AM EDT by Randall_Rausch]
Link Posted: 12/27/2005 12:33:24 AM EDT
Link Posted: 12/27/2005 5:58:24 AM EDT
I've built a couple Model 1 Sales 11.5 inch upper ARs. One as a pistol, and one for an M16A2 conversion. Neither one had any issues.





I also got the first upper within 24 hours of ordering; the second took almost two days.
Link Posted: 12/27/2005 6:29:51 AM EDT

Originally Posted By 3-4CAV:
I've built a couple Model 1 Sales 11.5 inch upper ARs. One as a pistol, and one for an M16A2 conversion. Neither one had any issues.

img.photobucket.com/albums/v311/120mm/PDR_0712.jpg

img.photobucket.com/albums/v311/120mm/PDR_0741.jpg

I also got the first upper within 24 hours of ordering; the second took almost two days.




Thanks ...
Link Posted: 12/27/2005 6:44:11 AM EDT
3-4 Cav:
What do you use for buffer (weight)? Standard Carbine?
Thanks
Link Posted: 12/27/2005 1:12:55 PM EDT
Link Posted: 12/27/2005 2:41:43 PM EDT
[Last Edit: 12/27/2005 2:43:50 PM EDT by SBR7_11]

Originally Posted By Gunzilla:
they run fine with a suppressor... or course you really want a suppresor with one too.




Working 16yr next month with my Bushmaster 11.5", runs fine, suppressor or not.

Suppressor just adds more to the cool factor. You should see people grabbing "ears" when I get ready to fire with the suppressor out front.


It's the extra debris that comes back into the upper that dirty up the rifle and start causing problems, not the fault of the 11.5". A little more oil and carry on. Mobil-1 works wonders in this dept.
Link Posted: 12/27/2005 3:03:23 PM EDT
As I understand it, many of the reliability issues are results of the higher operating pressures of the short gas system. So that shouldn't be any differant than shorty 14.5's, some of the critical parts will wear out and need replacing every 7,000-10,000 rds or so, others will last longer. Most people, starting with a new gun, would never put enough high pressure rounds through it to need to replace anything. I say high pressure because I would speculate that SAAMI stuff and wolf wouldn't wear as quickly, due to their lower cartridge pressures.
Link Posted: 12/27/2005 4:28:54 PM EDT
[Last Edit: 12/27/2005 6:27:55 PM EDT by Va_Dinger]
Anybody who does enough research is going to find out both 10.5"'s and 11.5"'s can have problems. They are a compromise, short and handy but they require a watchful eye to be reliable. Personally I have not had a single problem with my 10.5", but I took the time to research the proper set-up and do meticulous preventative maintenance and cleaning to mine. Short-barreled AR’s are much like a high end 1911. They can provide perfect performance and reliability, but it takes more work from the end user. If your not willing to go the extra mile to run a shorty, you would be better off sticking to a 16" barrel.

After having fired thousands of rounds from my 10.5” with absolutely zero problems I suggest this set-up:

(1.) Heavy duty extractor spring - Change it out every 4-5 thousand rounds
(2.) Crane o-ring or D-fender. (I run Crane o-rings from Adco)
(3.) H2 buffer or H buffer at the very least. (I run a LMT H2 from G&R Tactical)
(4.) One-piece gas rings – I do not use this mod personally, but Crane runs them in their CQBR. I bought a set but have not installed them yet. So far mine runs 100% reliable without them but if your having a problem it might help. Brownells has them in stock.
(5.) Extreme cleanliness and attention to lubrication. A 10.5” and 11.5” require more than just a regular AR cleaning session to be reliable. During a recent class I would relube mine whenever the bolt/carrier dried out. It ran like a champ throughout the entire class.
(6.) Extractor - Nothing fancy, but you need to keep a careful eye on it. If it gets worn, replace it.
(7) USGI w/MagPul follower or HK mags – Same as any AR
(8.) Quality ammo - Same as any AR


Link Posted: 12/27/2005 5:02:09 PM EDT
Wow, sounds like a "prima donna" rifle.
Aside from the barrel twist - would 30-40gr bullets make a difference?
Thanks
Link Posted: 12/27/2005 5:43:29 PM EDT
[Last Edit: 12/27/2005 5:46:09 PM EDT by Va_Dinger]

Originally Posted By WSAR15:
Wow, sounds like a "prima donna" rifle.
Aside from the barrel twist - would 30-40gr bullets make a difference?
Thanks






You lost me.


Link Posted: 12/27/2005 5:53:12 PM EDT
So,you guys are saying I can't cut my 16" SP-1 barrel down to 11.5"?
Clint
Link Posted: 12/27/2005 6:05:04 PM EDT

So,you guys are saying I can't cut my 16" SP-1 barrel down to 11.5"?


They're saying you can cut it down if you want, but without a custom gas block you'll have made your rifle into a single shot. Hey, you could always sell it as a California-legal AR! :)
Link Posted: 12/27/2005 6:09:26 PM EDT
Link Posted: 12/27/2005 6:32:17 PM EDT
Link Posted: 12/27/2005 6:45:25 PM EDT
[Last Edit: 12/27/2005 6:46:05 PM EDT by bigbore]
Link Posted: 12/27/2005 7:00:29 PM EDT
[Last Edit: 12/27/2005 7:02:09 PM EDT by Randall_Rausch]
Link Posted: 12/27/2005 7:13:16 PM EDT

Originally Posted By macros73:

So,you guys are saying I can't cut my 16" SP-1 barrel down to 11.5"?


They're saying you can cut it down if you want, but without a custom gas block you'll have made your rifle into a single shot. Hey, you could always sell it as a California-legal AR! :)


You lost me there. I thought the gas port was located under the FSB? If so,I would still have at least 2" of barrel in front of the gas port. Why would I need a custom gas block?
Link Posted: 12/27/2005 7:16:16 PM EDT
bigbore, why not run a 12.5 with a midlength port?
Link Posted: 12/27/2005 7:17:39 PM EDT
Link Posted: 12/27/2005 7:20:58 PM EDT
Link Posted: 12/27/2005 7:21:54 PM EDT
Link Posted: 12/27/2005 7:23:18 PM EDT

Originally Posted By Randall_Rausch:
Someone made a bad assumption that your 16" SP-1 was originally a 20" configured barrel that was shortened to 16".
If you were to cut that critter back to 11.5", the front sight base would fall off and the barrel between the FSB and chamber is too small to put a gas block on.
As you probably have a CAR SP-1, you can surely cut it back to 11.5".
You will just need to open up the gas port to the appropriate size.


My barrel is a 16" Colt SP-1 carbine unit,,never been touched.
What would be the appropriate port size for an 11.5" barrel?
Thanks,
Clint
Link Posted: 12/27/2005 7:46:42 PM EDT
[Last Edit: 12/27/2005 7:48:41 PM EDT by bigbore]
Link Posted: 12/27/2005 8:41:39 PM EDT
[Last Edit: 12/27/2005 8:47:04 PM EDT by 3-4CAV]
I've used standard carbine buffers. The one that M1S provided with the "kit". Nothing special. Maybe I've been just lucky, but no problems.

Link Posted: 12/27/2005 8:50:23 PM EDT
Interesting post bigbore. I kinda like the idea of a 12.5. If I am going to get an SBR, 14.5 aint worth it and 10.5 is too short. Thats why I ask.
Link Posted: 12/28/2005 12:34:39 AM EDT
The IDF widely issues the Colt Commando, especially to squad leaders, medics and radio operators. For the house to house, street to street fighting its an excellent weapon. The IDF apparently has had great luck with the 11.5 inch setup as they have been using it since the 60's.
Lethality with M193, which is still in use by the IDF as are other 5.56 bullets, would provide an accpetible amount of lethality and range for MOUT. The IDF uses alot of "short" rifles such as the SAR and Micro Galil. The widespread use of these weapons indicates that they are quite effective for the type of combat the IDF enages in. Considering that the IDF fights almost exclusively in urban areas and relies heavily on air support, the lack of range isn't really an impediment. A weapon with a range of 50-100 yards is acceptible in this situation. Strangely, I have seen several Colt Commando's in the hands of IDF soldiers which have been turned into DMR type weapons....which seems a little non-sensical.

Depending on the unit, you will see IDF soldiers armed with a Galatz, M21, M14, M16A2, Colt 653, Commando, M4, Galil hybrids and etc....I have yet to understand the rhyme or reason behind the assignments of weapons in the IDF. I would speculate that its reserve and secondary forces which use the hodge podge.
Link Posted: 12/28/2005 1:52:41 AM EDT
Link Posted: 12/28/2005 6:12:23 PM EDT
[Last Edit: 12/28/2005 6:15:39 PM EDT by Clint50]

Originally Posted By Tweak:
this is the first I've heard of a 16" SP1 barrel.

you can but why would you? if it's the CDI factor then get over it



What else would a Colt SP-1 carbine have,out of the box?
Not sure what brought the second comment on.
Any thoughts on whether a Noveske KFH will help on a SBR? Mine arrived today.

Thanks for the other info.
Clint
Link Posted: 12/28/2005 6:37:46 PM EDT
[Last Edit: 12/28/2005 6:40:07 PM EDT by Randall_Rausch]
Link Posted: 12/28/2005 7:10:08 PM EDT
Just buy a LMT 10.5" upper add a Crane O-Ring and H-Buffer and you'll be fine. The LMT's flat out work. I've seen a few Bushy 11.5" have "issues".
Link Posted: 12/28/2005 9:49:12 PM EDT
Arrow Left Previous Page
Page / 2
Top Top