This service includes the conversion of any off the shelf AR15 barrel to work in a Lewis Machine and Tool MRP upper. This conversion only works with small frame (AR15) uppers. We do not do conversions for the large frame MWS (AR10) uppers.
You will need to supply:
- AR15 barrel (any length, any caliber)
- Gas block (optional)
- Gas tube (optional)
This conversion does not include a gas block or gas tube.
**Please note that this is a permanent conversion and once done, the barrel can only be used with the MRP Platform**
While this conversion can be done on most AR15 barrels, there are a few exceptions. The follow barrels are not compatible with the conversion:
- BCM Enhanced Light Weight barrels - These barrels do not have enough material in the chamber area to support being modified to work.
Compatible Gas Blocks
We recommend using an SLR low profile gas block due to it's low profile and quality. If you want to opt for an adjustable gas block, one from Superlative Arms works best because of it's low profile.
Compatible Gas Tubes
The type of gas tube needed is dictated by your gas block. 99.9% of the time this conversion will use a normal "bent" style mil-spec gas tube. **The one exception is if you are using a gas block that is specifically designed to work with a straight tube**
You will need to place an order through the website for the desired services. Once you place your order, you will receive an email order confirmation (double check your spam folder). On the top of the order confirmation email are some simple shipping instructions on how to get your parts sent into us.