What should I be looking for when I'm shopping for a bi-pod? What are good features? What are bad features? for what it's worth, i will be mounting it on a picatinny rail.
in before: harris bipods rock, don't buy anything else blah blah blah.
Not having the detail of your application other than tactical, here are some points to consider
Leg Length - length sufficient to put you in an ideal shooting position. Some people are ok with minimal length, otherwise shoot better with the rifle higher
Leg Adjustment - Are the legs spring loaded and auto stop when reaching a hard surface or do you have to manually extend each leg? Do they legs have infinite adjustability within their range of length or are they fixed length?
Leg Locking - Once you have the legs at the correct extension, how do they leg lock in position?
Pivot - Where you mount to the rifle, does the bipod pivot to allow you to keep your sights level? Is the pivot tight enough so it does not become an unstable wobble while still being flexible enough to allow intended movement to adjust your shooting position.
Materials - What is it made of and how is it coated? You don't want a bipod that is prone to corrosion or difficult to clean and protect.
There is no one perfect bipod for every application,,, Harris, Accushot and Versapod are just some brands and then there are very specialized bipods like those used in F-Class shooting.
Harris Universal BIPOD BARREL MOUNT Adapter # 4 - Rifle or Single Shot Pistol, HARRIS 25S 12" TO 25" SWIVELING / ROTATING RIFLE BIPOD S-25 S25 HB25S S-25 NEW, NEW HARRIS BIPOD 1A2BR 6" - 9" FIXED BENCH REST STANDARD LEGS PISTOL & RIFLE , NEW HARRIS BIPOD 1A2H 13.5" - 23" HIGH FIXED 2-PIECE STANDARD LEGS RIFLE PERCH, Harris 1A2 Rifle Bipod 8" - 12", Harris Rifle Bipod Ultralight "S" (Swivel) Series - Model SLM 9"-13" Notched, HARRIS BIPOD HBSL 9"-13" HIGH ROTATING MOUNT QUICK ADJUSTMENT LEGS RIFLE REST, HARRIS BIPOD HB1A2LM 9"-13" HIGH FIXED MOUNT QUICK ADJUSTMENT LEGS RIFLE REST, HARRIS BIPOD HB1A2L 9"-13" HIGH FIXED MOUNT QUICK ADJUSTMENT LEGS FOR RIFLE REST, Harris Rifle Bipod 1A2 Series with 6-9" Legs. Model: 1A2-BR, ROBAR Remington M700 Bedded Syn. Rifle Stock .308 Right Hand with Harris Bipod, Harris Engineering Rifle Gun Bipod S-BR sbr 6-9" Swivel br-s, New Harris Model L Series 1A2 Folding Rifle Bipod 9-13" Height, SRC Harris Airsoft Sniper Rifle Bipod, AGM Harris Airsoft Sniper Rifle Bipod, HARRIS BIPOD ADAPTER # 5 For A ROUND PLASTIC HANDGUARD On A .223 Rifle, UTG Tactical Low Profile Bipod - SWAT Hunting Police Harris Rifle Gun Duty Metal, HARRIS BIPOD HB1A2LM 9"-13" HIGH FIXED MOUNT QUICK ADJUSTMENT LEGS RIFLE REST, HARRIS BIPOD HB1A2L 9"-13" HIGH FIXED MOUNT QUICK ADJUSTMENT LEGS FOR RIFLE REST, HARRIS BIPOD HBSL 9"-13" HIGH ROTATING MOUNT QUICK ADJUSTMENT LEGS RIFLE REST, NEW HARRIS BIPOD BRM 6" - 9" FIXED BENCH REST NOTCHED LEGS PISTOL & RIFLE, NEW HARRIS BIPOD SBRM 6"-9" LEG NOTCH ROTATE BENCH REST PISTOL & RIFLE SHOOTERS, NEW HARRIS BIPOD 1A2BR 6" - 9" FIXED BENCH REST STANDARD LEGS PISTOL & RIFLE , UTG Tactical Bipod Sniper Profile Rifle Gun Carbine Harris Hunting bipods Metal, Harris Rifle Bipod 1A2H 13.5"-23" Solid Base NEW NIB, Mako Group Harris Bipod Picatinny Adapter for 223 Rifle, Harris Engineering Rifle Gun Bipod SBRM 6-9" Swivel Leg Notch model, Harris Rifle Bipod SBRM 6"- 9" Bench Rest Swivel NEW, Harris Rifle Bipod 1A2BR 6"-9" Bench Rest NEW, Harris Rifle Bipod S25C 13.5"- 27" Swivel Base NEW, Harris Rifle Bipod SLM 9"-13" w/ Leg Notches Swivel NEW, Harris Rifle Bipod 1A2BRM 6"-9" Bench Rest NEW, Harris Engineering Rifle Bipod 1A2-H HIGH 13.5-23" Legs, HARRIS 25C1A2 13 1/2" TO 27" FIXED RIFLE BIPOD 1A2-25C 1A225C HB25C 1A2-25C NEW, HARRIS BIPOD ADAPTER 14 For RUGER MINI-14 & RANCH RIFLE, HARRIS 1A2-25 12" TO 25" FIXED RIFLE BIPOD 251A2 HB25 NON-SWIVELING MADE IN USA, HARRIS RIFLE BIPOD S-LM HINGED MODEL 9"-13" EXTENDABLE AUTHENTIC MADE IN USA NEW, HARRIS RIFLE BIPOD S-L HINGED MODEL, 9"-13" EXTENDABLE AUTHENTIC MADE IN USA NEW, HARRIS RIFLE BIPOD S-BR HINGED SWIVEL MODEL 6"-9" AUTHENTIC MADE IN USA NEW, HARRIS RIFLE BIPOD 1A2-L SOLID BASE 9"-13" EXTENDABLE AUTHENTIC MADE IN USA NEW, HARRIS RIFLE BIPOD 1A2-BRM SOLID BASE 6"-9" EXTENDABLE AUTHENTIC MADE IN USA NEW, HARRIS RIFLE BIPOD 1A2-BR SOLID BASE 6"-9" EXTENDABLE, AUTHENTIC MADE IN USA NEW, HARRIS BIPOD ADAPTER For RUGER MINI-30 & MINI-14 RIFLE, HARRIS S-LM 9" TO 13" SWIVELING / ROTATING RIFLE BIPOD W/ LEG NOTCHES LMS HBLMS, HARRIS S-BRM 6" TO 9" SWIVELING / ROTATING BENCH REST RIFLE BIPOD W/ LEG NOTCHES, HARRIS S-25C 13 1/2" TO 27" SWIVELING / ROTATING RIFLE BIPOD S25C 25CS HB25CS, HARRIS LS 9" TO 13" SWIVELING / ROTATING RIFLE BIPOD S-L SL HBLS S-L MADE IN USA, HARRIS LM1A2 9" TO 13" FIXED RIFLE BIPOD W/ LEG NOTCHES 1A2-LM 1A2LM HBLM 1A2-LM, HARRIS L1A2 9" TO 13" FIXED RIFLE BIPOD 1A2-L 1A2L HBL NON-SWIVELING MADE IN USA, HARRIS H1A2 13 1/2" TO 23" FIXED RIFLE BIPOD 1A2-H 1A2H HBH 1A2-H NON-SWIVELING,