DMR Help

[Phillip71]

Hi guys am looking to turn my recently purchased Specna Arms DD MK18 into a DMR platform.  Any help and tips greatly received please

[Fatboy40]

Is it the Core or Edge?

[Sneaky]

If you search the forum, as there are a few posts of members recently asking to make a DMR platform.

[Rogerborg]

Specna Arms aren't the ideal choice for this, as the Orion gearboxes have quite the reputation for cracking, even though they're well radiused.

 

That said, I've just done exactly that to a short barrelled Edge SA-02, and my parts list from ak2m4.co.uk was:

 

Product Name	Model	Quantity	Price	Total
			Sub-Total:	£51.00
			Royal Mail 1st Class:	£1.50
			Total:	£52.50
Omega Nub Hard 85 (Gear Parts)	GPOMEGABLACK	1	£2.00	£2.00
ZCI Cylinder Stainless Steel (Closed)	M60	1	£8.00	£8.00
ZCI Hop-Up Bucking 70° Black	M104A	1	£2.00	£2.00
Rocket Selector Plate (V2)	SECP02	1	£3.50	£3.50
XT Outer Barrel Extension (7 Inches)	XTOB7	1	£8.00	£8.00
AOLS AEG Inner Barrel (455mm)	AOLS455MM	1	£20.50	£20.50
Gearparts AEG Spring M130	GPM130	1	£7.00	£7.00

 

 

The bucking was to flat-hop, and I then s-hopped it, but ended up binning all that off and going with a Maple Leaf macaron 60 and the stock Specna Arms nub which is a decent shape. The selector plate was so that I could keep the stock one untouched. To lock to semi, you just file out this area.

 

 

I've stuck with the stock hop unit, piston, head and nozzle as they're decent enough, and I also bought an M140 spring elsewhere, I can't recall which one I ended up going with to get to 1.8J, you'll just have to suck-it-and-see (then cut-it-and-see) to get it dialled in for your site limits.

 

Gears are standard, and I'm running a Big Dragon M160 motor from Ali Express. SHS High Torques are quite popular.

 

I'm happy keeping it on 7.4V, it's not like milliseconds of response is vital at DMR ranges.