www.ar10t.com/forums/other-rifles/13675-...imitstart=0&start=10
Base Rifle - MGI modular QCB-D upper and Modular Lower.
Stock - Magpul CTR
Grip - Magpul MIAD
Trigger - Geissele Super Semi Auto - Enhanced
Gas Block - PRI Adjustable
Muzzle Break - PWS FSC
Calibers .22LR, 5.56/.223, 5.45x39, 7.63x39 with AK47 mags, 6.5 Grendel
Planning to add a 7.5" 300 BLK next once I get the SBR paperwork done.
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I really like the tool-less takedown, easy to switch calibers, easier to clean.
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Longest parts are the barrels at about 20" with gas tubes and muzzle breaks.
Easy to fit in a suitcase or backpack for discrete carry.
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I can shoot AK47 ammo right from AK47 mags.
I have a fully upgraded CMMG 22LR kit that has the bolt hold open forward assist cuts etc to duplicate normal operation for training.
Of course people want to know about return to zero.
1. Install desired caliber and shoot 5 - 10 round group at 25 yards.
2. Shoot 5 - 10 round group removing and re-installing barrel between each shot.
3. Compare targets.
I have yet to have a barrel that made groups large enough in step 2. for me to notice. I'm not shooting at 100yrds off a bench ether but I might get to that point this summer.
I keep a dope book to record sight and gas system settings for each caliber and then each load for given caliber. I record settings in MOA and gas adjustment from fully closed. That allows me to swap to a bran new optic or iron sights, zero with say 22LR at 25 yards with as many rounds as I need, than install 5.56 adjust settings on sight and fire a 3-5 round group exactly where I expect to hit. It saves on expensive and hard to find ammo.
A word of caution. Some people have had problems dealing with MGI as a company, getting parts or customer service.
My experience has been good. I sent in my old CQB-C upper because it cracked where it was machined too thin, they sent back a bran new CQB-D upper at no charge. I sent my lower in due to the buffer retaining pin damaging the buffer (I was hoping to get a new lower as I assumed the buffer retainer pin hole was in an out of spec location) they replaced the buffer and sent it back. So I would rate my experience with MGI as an A.
I bought only the stripped upper, lower, magwells and 2x buffer spring from MGI and built the rest of my rifle using top tier components, many from Armalite. My result was a rifle that has preformed to top tier standards.
Every time a new wizz-bang AR-15 or even AK based round comes out, I'm generally only a barrel and maybe a bolt away, a $200 to $300 investment that normally costs $1200 and up.
I like to say my MGI is my little B$&#h with multiple personality disorder.
