The Remington M870 & M1100/M11-87 Shotguns: A Shop Manual by Jerry Kuhnhausen
The only really detailed gunsmithing and repair manual ever published on these Remington shotguns. 100's of crystal clear photos and illustrations.
This incredibly detailed book covers troubleshooting & problem solving (including the cause of and remedy for M870 shell/action jams); full disassembly and reassembly; exploded parts and parts assembly diagrams; parts inspection; identification of early and late style parts and model specific parts; M11-87 design and parts differences; parts fitting and replacement, and complete repair.
Also included: headspace checks; installing oversize locking blocks; shell latch installation and staking; interceptor latch identification and replacement; chamber throating; trigger plate left hand safety switch conversions; screw-in choke tube installation; removing barrel dents; vent rib straightening; how to make now obsolete M58 and M878 barrels from M870 barrels; gas port table; choke table, and the special tools needed to work on these shotgun models and where to get them.
Expanded edition - 226 pages with plastic laminated soft cover, 100's of crystal clear photos and illustrations, 6" x 9".
2nd ed., revised 1992