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.

The post APS SR-2 Custom Build – PRS Stock Installation appeared first on Jercouzen.

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.

The post WIP – PRS Stock and Camo Painting Day appeared first on Jercouzen.

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.

The post APS SR-2 Custom – Phase 1: Upgrades Complete! appeared first on Jercouzen.

Last week I bought an APS SR-2. It’s a bolt action springer designed for the Air Precision Shooting (APS) competitions in Japan, where shooters mostly aim at short range and emphasize on accuracy. Unlike most Airsoft rifles, this one has no hop up system, focusing on consistency between shots rather than extending range. Being that, most people say it’s not exactly a field rifle, which is true. But that doesn’t mean you can’t turn it into one.

And so I set myself on a quest to transform this competition rifle into a field sniper rifle. Accuracy and consistency is already there, I just have to enhance it, along with range. Something I plan to start this weekend or early next week (whenever my free time permits), as I take this rifle to EdGI Custom Works – a world renowned maker of custom upgrade kits for Airsoft guns, who happens to be a Filipino as well.

But that’s another story. For now, I’ll be focusing on my first impressions on this rifle as well as its performance on stock parts.

With the rifle, the package contains two 30-round magazines and a BB fastloader. I bought the scope and bipod separately.

The rifle extends from 976mm to 1073mm long using the 6-position expandable stock. It has a picatinny weaver rail for mounting the scope, and is compatible with a ball joint type bipod.

The rifle uses an 85mm short bolt stroke @ 33 degrees with the same cylinder as a Type 96.
This gives it up to 27cc of usable air volume when determining max barrel length for upgrades.

The stock inner barrel is 6.00mm inner diameter, 445mm length.

I took it out for testing the day after I level-mounted the rifle scope. And after I zeroed in the scope at 20 meters (I was limited by the length of the driveway.. lol), I did a five-shot test to see the grouping.

It was a fairly quick test since I had to go out of town later that day. But I’m quite pleased with the results, given how this rifle performs on stock parts.

Can’t wait to see what this baby can do once upgraded. 😀

The post APS SR-2: First Impressions appeared first on Jercouzen.

The hop up system basically creates a backspin on the BB, which in turn, generates some lift. This allows the BB to follow a relatively straight flight, as opposed to its natural parabolic trajectory, for as long as it can maintain lift. And that’s why it’s more important for hop up enabled rifles/guns to stay leveled. If you tilt the firing angle left or right, you also change the direction of lift from the hop up, thus veering your BB off target left or right.

To start, we’ll be needing a solid base to hold the rifle in place. A gun/rifle vise would work great, but for those who don’t have it (like me, lol) you can always improvise. You’ll also need small levels, which you can buy at your local hardware stores.

First attach the mounts on your rail interface and adjust it with the scope to see the position you’ll be using the scope at. Once you find the position you’ll be using the scope at, secure and fasten the base of the mount. Then remove the top rings as well as the scope to start leveling the rifle.

Place the level(s) on the rail mount of your rifle and adjust until the bubble centers.

Here you can see I used two. I was also making sure the the rail itself is precise so I put two levels on different sections to check. I actually did this on multiple sections to verify the quality of the rail.

Make sure the rifle is secured once it’s leveled. It’s absolutely important that the rifle will not move when you do the next step, which is leveling the scope.

Place the scope on the base of the mounts and adjust it to the position that you wanted earlier. Then loosely fasten the scope with the top rings. Tight enough to hold it in place, but loose enough to effortlessly rotate the scope in its place.

Then place a level on the top turret and adjust until it centers.

After it’s leveled, fasten the scope by carefully tightening the screws on the mounts. Make sure the scope does not slide out of its leveled position while doing securing it in place.

You now have a leveled rifle scope and you should be ready for the next step, which is to zero in your reticle.

The post How To Level A Rifle Scope appeared first on Jercouzen.