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Tuesday, 26 February 2008 06:25 |
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Custom SPR Designated Marksman M15A4
Codename: ODYSSEUS
Designed by Erik Cota
After playing with a number of different M15 variants in my time on the Airsoft field, I was on the hunt for a tweener gun that is small and compact, yet has great range. I have lugged around full length M16 and SPR’s and they just didn’t fit the bill for what I was looking for. The full stocks were a bit too long for my arm length and always seemed to get in the way. With the smaller M4 variants, you cannot get much range out of a short barrel yet the length works perfectly with a retractable stock. So this custom SPR was my answer. A tight and compact gun that packs the range for long distance targets and features a retractable stock I can work with!
CLICK ON IMAGES TO ENLARGE
I started out my transformation with a Classic Army M15A4 Rifle (AR003M). Stripping it all the way down to the bare essentials. I kept the receiver and receiver components (magazine release etc.) mech box, and hop up unit. Next, while I had the mech box out of the gun, I began the internal upgrades. Before I started my upgrade I removed the stock spring, all the stock gears, and cylinder. I cleaned the gun down and got ready for a Classic Army Helical Super Torque Up Gear Set (P164P). I made sure my shimming was precisely fitted and everything was set properly and then installed a Classic Army Bore Up Cylinder (P228M), a reinforced piston (P073P) with aluminum piston head (P229M) and a Private Parts Airsoft 130 spring.
I closed it up, secured all the screws and threw it in a gun to test the velocity in feet per second (fps). The first series shot 462 fps, 465 fps, and 460 fps. Excellent, got that extra range right there! Since the internal upgrades were complete, it was now time for the fun part. Adding rails, and all that other fun stuff! Since I used a stock M15A4 rifle, the body is not cut for a crane stock nor was the spacing correct for the wiring. I made my measurements and cut an inch and a half off of the stock tube attachment. And that’s it! No other modifications needed to be made to the body. It was ready for accessories!
Its rail time! I grabbed a Classic Army SR25 Rail System (A219M); I used all the parts included except for the outer barrel assembly. This rail gives you a massive amount of real estate to add any accessories or lasers and lights. In this case I attached a bipod (A028M) and a QD Sling Swivel (A241M) and some rail panels (A178P, A042P). Instead of using the outer barrel included with the SR25 rail set, I decided to use a convertible barrel set (A074M). This barrel is just long enough that it sits flush with the end of the rail system, exactly what I was looking for. Also the way this barrel looks is really beefy and gives that look of a match barrel. I threw on a mini gas block (included with the SR25 rail system) and installed the rest of the system. And to top it all off I screwed on an SPR type flash hider (A164M) for that special purpose rifle look. Then I installed a Classic Army 364mm 6.04 Precision Inner Barrel (P300M) for a little extra power and more precision. The upper receiver was now complete.
Now to finish the lower receiver. I decided on a Special Forces Crane Stock (A101P). It is by far one of my favorite stocks to put on a gun. It is comfortable and provides a nice cheek rest, and gets your eyes behind any optics. Plus I can fit a 9.6 4500 battery inside to power that 130 spring.
Time to put it all together. I installed the upper receiver on the lower and bolted it down with the stock body pins and installed the magazine catch. I’m a big fan of BUIS (Back Up Iron Sights) so at the front I used a Folding Front Sight (A190M), and at the rear a Sniper Flip Sight (A181M). Now, it’s optics time!
Since this gun would provide over watch for my squad, it is best to throw on a powered scope. I went with a NC Star 3-9x40 Sporting Scope. This piece of glass has great optical clearness, has great magnification and is cost effective. To attach this scope on the gun I went with AMP Tactical’s AM1 and AM2 Scope Mounts. I installed the Cantilever Mount (AM2) on the front half of the scope and the High Mount (AM1) towards the rear of the scope. It may seem a little strange but it moves the scope just far enough forward that it gives me the correct focal length to utilize the scope. And thus, I declare this gun finished! Time for a little skirmish and we’ll see how it does.
Components Used
Classic Army
[AR003M] M15A4 Rifle
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Classic Army
[A181M] Sniper Rear Flip Sight
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Classic Army
[A241M] Quick Detach Sling Swivel
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Classic Army
[A197M] Bipod Rail Adaptor
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Classic Army
[A101P] M15 Special Forces Crane Stock
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Classic Army
[A219M] SR25 rail system w/outer barrel (510mm)
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Classic Army
[A224M] M15 CQB Tactical Charging Handle
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Classic Army
[A178P] Handguard Panel Set (98mm) Black
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Classic Army
[P300M] 6.04mm High Precision Inner Barrel for M4A1 Stainless Steel 364mm
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Classic Army
[P164M] Helical Super Torque Up Gear Set
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Classic Army
[A028M] Bipod for Socom Sniper/M14
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Classic Army
[A164M] SPR Steel Flash Hider, CCW
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Classic Army
[A074M] M15A4 Convertible Outer Barrel
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Classic Army
[A190M] RAS Folding Front Site
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Classic Army
[A042P] Handguard Panel Set for RAS/RIS
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AMP Tactical
[AM1] 30mm Quick Detach Ring Mount
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AMP Tactical
[AM2] 20mm/30mm Cantilever Mount
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Private Parts Airsoft
[PPA130] AEG 130m/s Spring
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[SCP3940OR] 3-9x40 Rubber Armored Scope
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Last Updated on Tuesday, 26 February 2008 08:46 |
Spartan Tactical Designs 
