After doing a few finishing touches on my custom stock extension tube for the APS SR-2, I waited an extra day for the painted parts to dry before proceeding with the installation of the PRS adjustable stock to the rifle.

Here’s a quick peek at what the finished mod looks like.

Before we get to more images of the results, let’s go over the installation process.

To start off, here’s what the finished stock extension tube looks like after sanding it with 320, 600, 1500, and finally, 2500 grit sandpaper. And yes, it reminds me of the days when I lapped CPU heatsinks for overclocking. lol.

Chrome finish on the tube, with zero black camo paint on the exposed parts.

Close up of the guide slots.

Custom length steel bolt, with washer, inside the extension tube.

Extension tube fitted into the APS SR-2 receiver guide.

Custom stock extension tube fitted to the APS SR-2 lower receiver;

with the threaded end cap secured into place.

PRS stock fitted onto the new assembly.

Securing the PRS with a secondary bolt that goes into the threaded end cap.

Closeup of the PRS after installation.

Rear view of the rifle with the PRS stock installed.

Here are a few more shots of my APS SR-2, in full view of the rifle, with the PRS stock installed. The total length is now 50 inches, and although I haven’t exactly weighed it yet, it feels like carrying a 50 cal. around. Well, almost. lol.

I’m quite happy with the outcome of the mod. Along with the internals on a previous upgrade, everything turned out great. 😀

My next mod would be fitting a PSG-1 style sniper grip to this rifle. And again, having non-standard parts, that would require machining a block of tempered aluminum to make the rifle compatible with the grip.

A more immediate concern though is sourcing out the sniper grip itself. I seem to have a knack for requiring things at a time stores are mostly out of stock. lol.

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After considering the effort involved in sourcing out the tube and modding it, along with the potential complications posed by attaching two parts that are not meant to, I decided to make one from the ground up instead. And that’s when I went to the machine shop with my design and had it fabricated.

This is what I got.

Overall I’m very pleased with the results. And after the quick installation test that I did, I dismantled everything again and worked on giving the tube a chrome finish and a zero black camo paint job on some parts.

Right now I’m waiting for the painted parts to dry, so I will post pics of the finished mod probably tomorrow.

The post WIP – APS SR-2 Custom Extension Tube for PRS Adjustable Stock appeared first on Jercouzen.

So earlier today, I went to a trusted machine shop (the same one that did the copper spiral evaporator for my single stage phase change cooler) to have my custom stock tube fabricated from T6 aluminum. It’s gonna be one of a kind, and totally different from the way the Japanese installed the PRS on their SR-2s. Since my rifle isn’t going to be for an APS cup competition, I made sure that my design and materials were all field combat worthy.

And well, seeing my rifle “butt-less” I had the sudden urge to disassemble it and paint the suppressor and polymer parts with zero black camouflage paint so it becomes closer to the flat black finish of the metal parts.

Hopefully I can keep myself busy enough until the machine shop finishes my custom stock tube next week.

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Earlier today I picked up my APS SR-2 from EdGI Custom Works, where I had it upgraded. The great thing about EdGI is, first, he offers world-class custom parts (and by that I do mean world class – high end airsoft snipers all over the world use his upgrade kits). Second, he offers upgrades for virtually non-upgradeable rifles like my APS SR-2; thus turning my field rifle conversion project into reality. And yes, he’s Filipino, woot!

Though I don’t exactly have the time to do in-depth testing right now, I will as soon as possible. I already tested the rifle on stock parts before, and it seems to be accurate up to 50 meters or so; using .32g BBs at roughly 370+ fps (450+ fps using .2g). So yeah, I’m bloody excited to see what this beefed up baby can do, now that it fires at 550 fps using .2g rounds. lol.

For now, here are the current specs and images.

• EdGI 5.98mm ID 650mm Length Inner Barrel
• EdGI Barrel Extension (Silencer Type)
• EdGI Piston
• EdGI SP01 Spring
• EdGI Spring Guide
• EdGI Piston Sear

For Phase 2 I’ll be doing external mods, namely the PRS stock and sniper grip, along with whatever ideas I am yet to come up with. lol.

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