2024年12月14日 · Hk416A5/m27/brn-4 m27/black ops defense clone bayonets. A5 and black ops clone are to large and are sized for the heavy profile of the mr556 profile thickness. M27 and …

2024年10月6日 · No brn-4 op rod issue until I opened gas port to 1.8mm to get last round hold open. Op rod over traveled compressed to far blew piston rings on 2 different pistons. I …

2021年1月4日 · I can tell you from experience that If you start cerakoting parts and using genuine HK parts you'll end up with in arms reach of just flat out buying a used unmodified stock …

2024年9月8日 · Apparently Brownells appears to be releasing their new run of the BRN-4 lowers soon, they've just added the listing on their website over the weekend from what I can tell. …

2024年1月30日 · I’m sorry to say the Brownells BRN-4 BCG is out of commission after 500 rounds. For the price it was a great option for a build. I didn’t have any problems until around …

2022年1月21日 · Thanks. That’s definitely not a lot in relation to other AR lower manufacturers. I saw a BRN-4 lower with mostly HK parts and Gen 1 stock sell last week for $2,500 but it had a …

2019年4月15日 · I have a BRN-4 lower from Brownells and intend to have a person engrave the lower to make it a semi 416D clone, to match an HK upper I recently purchased. I have a …

2023年11月12日 · My 10.4" BRN-4 barreled upper shoots about 1.5-2" groups with IMI 77gr razorcore and an unmagnified eotech at 100 yards. IMO that is perfectly acceptable for what I …

2021年1月1日 · MR 556 / BRN-4 Bolt Review and Survey Jump to Latest 5.1K views 15 replies 8 participants last post by Gatsby177 Feb 7, 2021

2023年10月30日 · This series of post is about my experience with 2023 BRN-4 barrels BRN-4 small parts and BRN-4 upper receiver. Problem was with an improperly machined BRN-4 …