no problem ,i showed that merit sdet up to my ole man .he said it was neat but they wernt making it 10 years ago when he got his 15 a2 .he just got the apture from brownells and drilled th standard sight for th thread on the apture ,i think it was 8/32 so you can bare that in mind when you get the carry handel if from a different mfg . you can get there from here !