Orders starting #10742 and higher will have a slight delay in shipping due to the holiday weekend 
We do not ship to the following states: CA, CO, CT, DE, FL, HI, IL, MA, MD, MN, NJ, NV, NY, OR, and RI.  
NO INTERNATIONAL ORDERS
If you order from one of these states, You will be refunded and a 20% restocking fee will be charged. 
This ARSS15 is compatible with Milspec, Low Shelf Lowers. M16 pocket lowers can be made to work but will require an additional sleeve from BS Squirts.
These work with milspec type trigger groups. 
Geissele triggers will work but you will need the Over Travel Device from BS Squirts
True drop-in, forced reset trigger for AR-15 rifles. Delivers 700–900 RPM with full semi-auto legality via mechanical return-to-battery lockout. Four-part design, D2 tool-steel internals, 7075-T6 housing. Works with mil-spec, M16, and Geissele (with OTD) triggers.
The ARSS15 in conjunction with a regular milspec trigger and safety selector will be 2 position (Safe and super semi mode) 
For 3 position compatibility, you will need either a KAK Semi Auto 3 position safety selector OR a M16 Style safety and Trigger. 
A 45 degree Super Safe cut trigger will also work.
You will also need a Full Auto style Bolt Carrier Group as well as an H2 or H3 buffer for reliable function. (I recommend an H3)
Due to slight tolerance differences in uppers and lowers, some fitting may be required. Please contact support@2aninja.com for troubleshooting  and questions. 
Not compatible with the following list, will continue to update as we find out more from the not so common lower owners
M16 pocket Lowers (we will have a sleeve available in the next couple weeks)
Ruger AR556
I will be posting informational videos on instagram @2a_ninja