Screw in Choke Tube installation machine work for 12 Gauge Barrel rem win tru

I am a Gunsmith and Tool and die Maker by trade Have been in business for the past 32 Years. What this listing is for is for screw in choke tube system machined in your existing or fixed choke barrel. I can do the Following systems in 12 Gauge Win Choke, Remchoke, Browning Invector, Browning Invector Plus, Mossberg Accu Choke, Tru Choke, Tru Choke Small Diameter, In 20 Ga I can do Rem Choke, WIn Choke, Browning invector and invector plus, Mossberg accu choke, Tru Choke, in 410 I can do Win choke. Barrel outside diameter and bore concentricy determines which system(s) can be installed. If you have any Questions Please email me I will get back to you ASAP. My turn around once barrel is here is approx. 3 to 5 business days and it is back in the mail to you. I can shorten your barrel at no charge, if needing a new bead standard brass and aluminum are $15 installed Bradleys are $27 installed. Return shipping will be determined by your address no handling packing fees here ever. Cost is for machining service only no tubes are included at this price. Tubes are available at market price. Thanks for looking May God Bless!!!!