Faq Help Center
UMP CONVERSIONS FAQ’s
You will need a complete UMP lower (any model), a UMP stock, a UMP stock axel pin, a UMP stock block, and a USA-made UMP magazine (which also counts as your three 922R compliance parts).
The UMP mag release, mag release axel pin and front pin are not the same as the USC. You cannot swap the parts over from your existing USC. Those parts are not often in stock and sold separately. This is why we recommend that you buy a complete lower that can be converted to semi-auto.
All USC’s are rifles. They can only be converted to a SBR. There is no pistol brace option on a rifle of any kind.
No. There is no solution currently to convert the USC to a double-stack mag without doing a UMP lower.
No. By adding a pistol grip, you must make the firearm 922R compliant. That would require three particular parts to the platform.
Most commonly used are the USA-made magazines from HKparts.net. Those will count as all three compliance parts needed. You can also purchase the USA-made trigger, barrels, bolt carriers, and stocks. The current USA-made sear available through HKparts.net is incompatible with the USC fire controls.
No. Aside from trademark infringement, it is not legal to mark other manufacturers markings on a firearm without marking variants in place by the ATF.
A rear section fuse conversion is the most accurate UMP conversion. Cosmetically, it appears the same as a UMP. It also functions the same as the original semi-auto USC. Although the conversions are very strong, we still recommend using a top rail as a backup reinforcement on any fuse job.
No. Aside from trademark infringement, it is not legal to mark other manufacturers markings on a firearm without marking variants in place by the ATF.
Not directly, UMP carriers have to be machined to fit into the USC. We do offer a service that will allow your UMP carrier to fit into the USC.
Yes. The caliber change is just the barrel, bolt carrier, and magazine. It takes just minutes to change calibers on this platform.
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G36 CONVERSION FAQ’s
You need an SL8 rifle to start (any model). You will need a G36 de-milled rear section, G36 stock, G36 stock axel pin, G36 lower, G36 lower locking pin, G36 buffer plate, G36 magwell, and G36 bolt head. There are many models of G36’s and these are the basic parts you need to start the conversion.
No. All SL8’s are rifles. The only short barrel option is to SBR it.
No. There is no simple solution to adding a folding stock to your SL8. A full G36 conversion would be required.
Yes, but it requires conversion. That conversion requires purchasing a G36 bolt head and mag well and having the receiver properly milled and filled with accepting the double-stack mags. This process also requires you to add a total of five 922R compliance parts.
It is typically double the cost to buy an SL8 and have it converted to a G36 than it is to buy one of our USA-made versions (the T36). There is no pistol option on a SL8.
Yes, but it will cause cycling issues due to its weakness.
Yes, it will function, but it is not recommended.
T36 FAQ’s
No. The receivers are completely different. Currently, the only option for an XM8 build is to start with an SL8.
Yes, if you convert it. All German lowers are machine gun parts, including the SF marked lowers. They all have to be modified to fit and converted to semi-auto. They are not a direct fit.
Yes, if it is converted to semi-auto. All G36 bolt carriers are machine gun carriers and will not fit in our receivers unless rendered semi-auto.
Yes. The top rear alignment pin will need to be machined off.
Yes. A barrel install requires a G36 barrel wrench and mandrel.
Yes. The bolt carrier and lower has to be converted to semi-auto and to fit.
Yes! We have not tried ALL suppressers with the T36. The Silencer Co. Saker-K model is the only one we know of that is not compatible.
The standard sizes are 15mm by one right hand, which is the same as the German guns. We do offer 1/2 by 28 on certain models.
Yes. If you buy the specific AR-15 magwell, you can use AR-15 mags. Our complete guns ship with a G36-P mag or a German factory G36 mag.
The G36 platform was designed around .556 NATO ammunition. You may find that weaker off-brand ammo may not cycle properly.
Yes, but it will cause cycling issues due to its weakness.
Yes, it will function but it is not recommended.
XM8 CONVERSION FAQ’s
You will need a SL8 rifle to start. You will need an XM8 kit from Tommybuilt Tactical, a G36 Magwell, and a a bolt head.
No. The handguard and top rail are compatible but the rear of the gun is different. There is no way to do a proper XM8 conversion using the T36 receiver.
The XM8 used an Insight ISM-V. The civilian model was discontinued many years ago and is now very difficult to find. Currently, the Vortex UH-1 is the best option.
Shipping & recent orders
1. Make sure you have filled out a Work Order on our website with a description of the work requested and your contact information so we can contact you when the project is ready.
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