Quoted: The main thing is that my Colt lowers all have the stupid block so I can't use the full circle carriers.
|
If you want to use the full circle carriers you have a few options:
You could use a enhanced carrier (see top carrier in pic), if the rear circle doesn't hit your block.
You could remove your block like a lot of guys here using a dremel and very carefully cutting it. There are detailed threads with photos that shows step by step instructions, do a search.
A gunsmith could also remove the block if you wish.
Replace your lower with new Match Target, 6920, 6721 etc. which don't have blocks.
I never had any problems with my former Colt Lightweight carbine but now I'm using a LMT M16 carrier on my LMT M4gery to improve it's reliability. I'm just copying the current Colt 6920 version.
Top: Normal AR-15 Carrier
Middle: Colt "SP1" style Carrier
Bottom: M-16 Carrier
Pic source quarterbore.com link