I am looking to purchase the SR-25 ER model only or the MK11 model. I am looking for one that will fit the MK11 Suppressor (NOT the M110 suppressor which goes over a flash hider). The model I am looking for is the one with the button barrel and NO Flash hider. If you have one or any leads to one it would be great. Upper only would be good to but really looking for a full rifle. Definitely would like to have the one with the Ambi lower. Thank you