However, the two aspects that really intrigued me where the hold open and forward-assist, as I considered them potentially useful. Big deal you might think, but curb appeal, especially with this group of equipment, is an important factor. Nor did I like the MBUS rear sight, OK it’s a practical, fold-down design, but on an M4 I would have preferred the detachable D-handle (carry handle/sight unit) or similar.
Though this may sound a little ingenerous but the build, finish and feel of the Mk-4 did not do a lot for me. Fair one, but there is no mention of this in the handbook and if you did not know then you would assume the rifle was unshootable…
Apparently they can be adjusted (filed) to give a firmer engagement. This was traced to two, moulded lugs either side of the rear of the mag. Annoying was the first time I slid it into the well it jammed before it reached the locked position. I have experienced this with Black Dog too, which is something you live with, but it does get better. It does not show external pull down lugs like the S&W does, so filling is harder and they need some running in to get to capacity. At the rear is a lever that trips the integral bolt holding catch via the magazine platform as it rises.įeed is from a 25-shot magazine, which is made of grey plastic, doubtless to look like the old, aluminium Colt M16-types. Opening up the action shows a removable, rectangular adaptor that sits on top of the mag well inside the lower receiver.
#Cmmg mk4 manual
One of which is the working, M16-type automatic bolt hold open and manual release facilities, which and along with the S&W M&P 15-22 sets it apart from others in this class. I am told the rifle shows all the features available from CMMG. This consists of a plastic block with vertical slots that sits behind the bolt and pumping the plunger in the side of the receiver allows you to close the action if it doesn’t fully shut. This is much like the old 9mm AR15 SMGs and does look a bit ugly, though it works, so is well suited for south paws! Of particular interest is the bolt group, which is the usual, pull-out, pre-packaged, nickled or stainless unit and a working forward-assist. Here its spring-loaded cover is 25% shorter than the norm. Unusual on CMMGs is the large, plastic case deflector that partially covers the ejection port. Trigger pull is standard military with a firm but workable two-stage pull that trips at around 5-6 lbs. Operation is by a rear-mounted, synthetic T-handle as normal. The build shows a flat topped receiver and comes with a Magpul MBUS, fold-down rear sight. The receiver halves look to be cast alloy with a semi-matt finish. The build does not appear to be mil-spec and I did not like the plastic buffer tube and the material and mouldings of the pistol grip and butt are not as sharp as on other ARs. What arrived was their Mk-4 MULTI Carbine essentially an M4-type Rock River Arms type telescopic butt, A2 pistol grip oval/synthetic forend, 16” military-type barrel with flash hider and fixed, A-frame front sight.
#Cmmg mk4 plus
I was really looking forward to testing the CMMG and in my mind had built it up to some sort of super rifle, maybe a bit too much! As they have a proper automatic last round hold open and manual bolt release plus a working forward-assist, which is rare, if not unique on a rimfire. Though I am told by another they have a big order of guns coming in soon. Plus there was confusion over UK distribution, which got rather convoluted! After much talk there appears to be at least three potential importers, one of which supplied the test rifle. I first heard about them early last year as makers of what some said were the best 22 semi-auto AR15s, but it was not until May 2011 I went hands on.