10-21-2011, 07:39 PM
My Grendel is a Sabre Defense 16" M4 profile upper on a Rock River lower. Lower has the RRA match trigger with standard weight buffer with a collapsible stock.
I have two issues:
1. The chamber is very tight. When I try to clear a loaded round it is almost impossible to eject it. My 5.56 RRA upper has no problems ejecting a loaded round.
2. The rifle is marginally reliable with Hornady or Wolf ammo. It has both feed and ejection problems. I'm going to get some new mags (I have C-Products now). I cleaned the chamber and made sure it's lubricated. I have about 300 rounds through the rifle.
Any suggestions? The Upper is very accurate and I've been a fan of AA products for a long time.
Dave
I have two issues:
1. The chamber is very tight. When I try to clear a loaded round it is almost impossible to eject it. My 5.56 RRA upper has no problems ejecting a loaded round.
2. The rifle is marginally reliable with Hornady or Wolf ammo. It has both feed and ejection problems. I'm going to get some new mags (I have C-Products now). I cleaned the chamber and made sure it's lubricated. I have about 300 rounds through the rifle.
Any suggestions? The Upper is very accurate and I've been a fan of AA products for a long time.
Dave