glindy Posted January 19, 2013 Report Posted January 19, 2013 New to site and just picked up lar8 a4 20" and want to put buis on it in addition to a ~6x24 scope. Have flip sights installed on flat top,but they are 1 3/4 high,which makes it impossible to mount scope over them. Located 45 degree mount adapter, but since the gas block is lower than the rail, don't think iron sights can be moved to side. I had no issue firing M16 with gas mask on at an angle,would it be an issue to have full size scope mounted on a 45 off of receiver? Any suggestions appreciated.
planeflyer21 Posted January 19, 2013 Report Posted January 19, 2013 It sounds like you're talking about the flip-up gasblock front sight on some of the RRA models.Any flip-up sights are backups (BUIS/Back-Up Iron Sights or MBUS). If you have your scope mounted on a quick detachable mount/rings, why worry about it? If you want to go the 45* mounting route for backup sights, then don't worry about the front gasblock flip-up...just keep using it as a gasblock.Or start shopping for low profile gasblocks. >:DJon
unforgiven Posted January 19, 2013 Report Posted January 19, 2013 Welcome from Indiana brother glindy,I use Magpul gen2 rear sight with RRA one piece scope mount on LAR-8 with factory flip front.Take off scope mount flip up sights.Front pin is almost screwed all the way in for 100yd. zero.Just my 2 mags.
Spaniky73 Posted January 20, 2013 Report Posted January 20, 2013 If you are running an MBUS front sight attached to your gas block, beware that it could melt it if you run to many rounds through it to quickly. I did it before I installed my free float.
Robocop1051 Posted January 21, 2013 Report Posted January 21, 2013 If you are running an MBUS front sight attached to your gas block, beware that it could melt it if you run to many rounds through it to quickly. I did it before I installed my free float.How fast were you shooting, and how many rounds???My 300Blk and my .308 both have a MBUS sight on their PRI gas blocks.... Neither show any signs of melting. I guess my 300Blk doesn't count, because its not a "real" gas block. My .308 sights are still running solid... But the carbon fiber barrel might be helping.
Spaniky73 Posted January 23, 2013 Report Posted January 23, 2013 3 20rd mag dumps in a row did it for me. That was with OEM RRA gas block. Also all it did was deform the base enough that it was no longer tight and would move a little.
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now