7.5 inch AR-15 reliability

**shadow65** · 05-30-10, 19:47

I had a DPMS KittyKat upper. I had to open the gas port. After that, it ran great.
I used an M16 B/C, BCM extractor up grade and a 9mm buffer.
I'm building another using a Rainier Ultra Match 7.5". Can't wait to get it together.
I also run a Levang comp.

**120mm** · 05-31-10, 03:02

Originally Posted by miamitj

I've been running a 7.5 AR for 4+ years. My rifle has seen well over 30K rounds and runs flawless with everything I have tossed at it with the exception of wolf. I have also been known to run it suppressed but the barrel is pretty shot out now so I keep the can off of it.

My secret, it is a model 1 7.5" upper. Yea they get the worst reviews but my research at the time showed people had 100% reliability with their 7.5" setup.

Man, I wasn't going to tell that part of it... Mine was a 7.5 inch M1S upper, too....

**miamitj** · 05-31-10, 06:22

Originally Posted by 120mm

Man, I wasn't going to tell that part of it... Mine was a 7.5 inch M1S upper, too....

Model 1 has a history of making very reliable uppers. FDLE had 10.5 uppers by some big name and they switched to M1 because of reliability. Hell it took me forever to get my LMT 10.5" upper to run right and LMT was useless for support.

**bkb0000** · 05-31-10, 11:40

Originally Posted by miamitj

Model 1 has a history of making very reliable uppers.

**miamitj** · 05-31-10, 12:24

Originally Posted by bkb0000

If I had time, I would look for posts trashing LMT and Colt. When it came to 7.5" uppers, they had the best reports and mine, as well as others on this post, have proven to be reliable.

**miamitj** · 05-31-10, 12:34

Originally Posted by bkb0000

You should read these posts, for every second hand negative report about M1S there is a first hand positive report.

**MadDog** · 05-31-10, 13:08

Why are we turning this into a M1S bash fest???????????? The OP wanted to know about the reliability of 7.5" AR's. I had a M1S upper that I used extensively for about 6 years. It ran 100% from day one with so many rounds it was time to change out the barrel. That included 1,000's of Wolf rounds. I finally replaced it with a 6.8 SPC Noveske Diplomat upper. I venture to say you hear about problems with any platform but when they run well most people don't bother to post about how great it is.

MadDog

**bkb0000** · 05-31-10, 13:18

Originally Posted by MadDog

Why are we turning this into a M1S bash fest???????????? The OP wanted to know about the reliability of 7.5" AR's. I had a M1S upper that I used extensively for about 6 years. It ran 100% from day one with so many rounds it was time to change out the barrel. That included 1,000's of Wolf rounds. I finally replaced it with a 6.8 SPC Noveske Diplomat upper. I venture to say you hear about problems with any platform but when they run well most people don't bother to post about how great it is.

MadDog

one post isn't a "bash fest." we don't let incorrect information go unchallenged on this board- since its a very well established fact that M1S guns are prone to QC issues, a statement to the contrary to this fact must be refuted. otherwise, this board ceases to be a place of reliable information.

i will have nothing further to say about M1S in this thread- if you want to debate me, PM me or start a new thread.

**Stephen_H** · 05-31-10, 13:43

I prefer to use a piston operating system on anything 10.5" or shorter. I've had excellent reliability with the LWRCi 8" guns. My 6.8mm PSD has been through several carbine courses and has a total of about 3500 rounds on it without issue. I recently bought one of the 5.56mm PSDs, but it only has a couple hundred rounds on it.

Stephen

**CCK** · 05-31-10, 15:30

To me this is the one place a piston system excels.

Chris

Thread: 7.5 inch AR-15 reliability

Thread Tools

Display

Bookmarks

Bookmarks

Posting Permissions