APS UAR – Internals Review

I have to say, I’m pleasantly surprised with what I found upon opening the gun. Here we go, post #3 on the APS UAR AEG. All 115 pictures are after the break – I do invite you to take a look at these, though they may take a short while to load.

We were using the UAR on an extremely hot spring (probably M130 or M150) as a duster. It did go for a whole 3 minutes of extended bursts before the gun sounded like it had a jam. Kampfer got sort of distracted part way through fixing it and ended up asking me to do the gearbox work. Once again, a few screws were missing here and there, and the screw heads were obviously not brand new anymore – the UAR seen here may have very well been taken apart before.

As you can see in the pictures after the break, highlights to the design include M4 outer barrel, standard AK V3 gearbox (with quick change spring guide) and hop up unit with ambidextrous adjustment lever. The selector, trigger and magazine catch all work off of long control bars between the controls up front and the gearbox/magazine catch at the rear.

Mag catch tends to slip off the pin its sort of attached to when the gearbox isn’t inside the gun. Bolt stop on this UAR has stopped functioning – could probably be fixed by bending the V-shaped pot metal part attached to the butt pad.

The failure was caused by the cylinder head rubber pad coming loose from the cylinder head. It was initially glued on there, but came loose during the gearbox cycling, causing the rubber washer to end up being jammed through the cylinder head and causing the jamming noise.

Note that there was a nice thick coating of black grease over everything – including the hop up rubber and inner barrel. This probably is the cause of the absolutely terrible UAR grouping (at 10ft) I had previously filmed. Hop up rubber was torn, around the lip that seals against the air nozzle. A Plus Studios hop up rubber seems to fit and function (though I don’t have a shooting range to test the actual hop up effect), as it seems to feed without any issues on zero and full hop – the hop up mound also moves up and down when the hop up arm is adjusted for less or more hop.

Still, the UAR isn’t my cup of tea. I considered buying it to have a M4-magazine-compatible, PDW-sized bullpup as it has an AK gearbox and hop up inside, as well as the quick change spring guide – but it doesn’t look right to me. Sort of like how the PDR doesn’t work for me – it looks sort of cool, but I just can’t see myself actually fielding a gun like that. Ever.

I did consider buying it since I fixed it up and am now familiar with how to take it apart and put it back together. I definitely thought long and hard about it.

-juicy

Want to read my early impressions of the UAR? They weren’t as good as they are now, but they’re here if you would like.

APS UAR #1: https://overhoppers.wordpress.com/2013/01/28/aps-urban-assault-rifle/

APS UAR #2: https://overhoppers.wordpress.com/2013/01/29/aps-uar-update/

Note, 115 pictures after the break. Highly unfriendly to 64K internet connections. My apologies, but they’re all pictures of the internals taken apart and depicting how everything works.