I decided to post this in light of some of the various posts that have popped up lately. Back in 2009 while I was in Iraq I decided to build an SBR. I came to that decision because I really didn't see anything offf the shelf that appealed to me and I wanted it set up a certain way.
My search led me to go the Form 1 route (build an SBR) and I went to Bravo Company to get what I needed.
I purchased an 11.5" barrel with FSB, Daniel Defense 10.0 Lite Rail, M4 upper, BCM lower (purchased at an earlier date) and Magpul UBR stock.
I sent the barrel to Robb Jensen to cut and shave the FSB down to fit under the rail. I wanted to have a streamlined look and I was going to be running an AAC M4-2000 suppressor most of the time.
The build was completed in August 2009. Though it has undergone a few changes the barrel, BCG and lower parts have essentially remained unchanged.
Until this past weekend I never had a malfunction regardless of the ammo I shot. Then I finally suffered a bolt over base malfunction shooting some Herters steel case 55gr. (Thanks Pappabear).
It has had approx. 4500 rounds (I think closer to 5000) through it almost all of which was suppressed and I pretty much never cleaned it (at least in the traditional way). My cleaning regime mainly consists wiping the BCG off, wiping out the chamber area and relubing it. I punched the barrel probably 8 times. I know 4500 may not be alot, but you have to consider the time I spent away after it was completed in A'stan and various other locations for work.
I cleaned it tonight simply because I am getting ready to make some changes and I wanted to do an inspection in light of the malfunction. While checking the ejector I noticed it felt a little mushy. So I pulled it out and noticed the spring was not looking so good. I subsequently replaced the spring.
First pic is a new ejector spring and the old one for a visual comparison.
The second pic is of the BCG.
The third pic is the current configuration.
I have fired a wide variety of ammo through this set up. Over half the ammo was Hornady 55gr. steel case TAP, and some of the Herter's 55gr. steel case. It has also seen Federal M193, Lake City M855, Israeli 55gr. surplus, Swiss RUAG M193 clone, Hornady 75gr. 5.56 TAP, Hornady 75gr. steel case TAP and some handloads worked up by markm.
It has been very accurate with most of the ammo fired using the ACOG. I can easily hit steel at 300-400 yards. 90% of the time it has been fired suppressed.
Look for some future stuff after I put together my next upper using a Vltor MUR and BCM 11.5" CHF barrel.
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