Hi guys am looking to turn my recently purchased Specna Arms DD MK18 into a DMR platform. Any help and tips greatly received please
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DMR Help
- Thread starter Phillip71
- Start date
Rogerborg
Supporters
- Aug 22, 2017
- 9,190
- 6,048
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.
View attachment 76663
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.
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.
View attachment 76663
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.
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