From MSNBC theres a complete list of what he had or was found
At the school:1 Bushmaster .223 caliber model XM15 rifle with a 30-round magazine
1 Glock 10mm handgun
1 9mm Sig Sauer P226 handgun
1 Saiga 12 shotgun with two magazines containing 70 rounds
6 30-round magazines, three of them emptied
At the home:Guns:1 Enfield bolt-action .323 rifle
1 Savage Mark II .22 caliber rifle with magazine, 3 live rounds, 1 spent cartridge
1 black marksman BB gun
Ammunition:5 Winchester 12-gauge shotgun shells cut open, with buckshot
1 white plastic bag with 30 Winchester 12-gauge shotgun shells
1 can with .22 caliber and .45 caliber bullets
8 boxes of Winchester Windcat .22 caliber bullets, 50 rounds per box
20 "Estate" 12-gauge shotgun shells
4 boxes of SB buckshot 12-gauge, 10 round per box
1 box of Lightfield 12-gauge slugs
1 box of 20 Prvi Partizan 303 British rifle cartridges
1 box of 20 Federal 303 British rifle cartridges
2 boxes of .22 long rifle Blazer rounds, 50 each box
1 box with numerous rounds of Winchester .45 caliber bullets
2 boxes of 50 rounds of PPU .45 caliber automatic
1 box of 20 rounds for Remington .223 caliber
3 boxes of Blazer 40 S&W, 50 rounds each
2 boxes of Winchester 5.56 mm, 20 rounds each
1 box of Magtech 45ACP with 30 rounds
1 empty Box of SSA 5.56 mm
1 box of Fiocchi .45 auto with 48 rounds
80 rounds of CCI .22 long rifle
6 boxes of PMC .223 rem, 20 rounds each
6 Winchester 9 pellet buckshot shells, 12-gauge
2 Remington 12-gauge slugs
3 Winchester .223 rifle rounds
31 .22 caliber rounds
2 boxes of Underwood 10 mm auto, each with 50 rounds
130 rounds of Lawman 9mm Luger
2 spent shell casings for Glock 10mm
1 empty box of Gold Dot 9mm Luger
2 empty boxes of Winchester 9mm Luger
1 box of Underwood 10mm auto with 34 rounds
1 box of 29 miscellaneous 9mm rounds
1 spent .22 shell casing
1 small plastic bag containing numerous .22 caliber bullets
1 tan bag with numerous Blazer .45 caliber bullets
1 box of Blazer .22 long rifle with 50 rounds
1 box PPU 303 British cartridges with 9 rounds
2 Winchester 9mm rounds
2 brass-colored shell casings
1 small caliber bullet (live round) labeled C
Magazines:1 Promag 20-round 12-gauge drum magazine
1 MD Arms 20-round 12 gauge drum magazine
3 AGP Arms 12-gauge shotgun magazines
1 Surefire GunMag magazine with 8 rounds of Winchester 12-gauge, 9-pellet buckshot
2 AGP Arms 12-gauge shotgun magazines, taped together, each with 10 rounds of Winchester 9-pellet buckshot
2 empty Ram Line magazines for Ruger 10-22
1 AGP Arms Gen 2 12-gauge shotgun magazine with 10 rounds of Winchester 12-gauge, 9-pellet buckshot
1 clear plastic Ramline magazine for an AR 15
1 magazine with 10 rounds of .223 bullets
Knives:Metal bayonet
1 6-foot-10-inch wood-handled two-sided pole with a blade on one side and a spear on the other
1 Samurai sword with a 28-inch blade and sheath
1 Samurai sword with a 21-inch blade and a sheath
1 Samurai sword with a 13-inch blade and sheath
1 knife with a 12-inch blade and sheath
1 wooden-handle knife with a 7.5-inch blade and sheath
1 wooden-handle knife with a 10-inch blade
1 knife with a 5.5-inch blade and sheath
1 black-handled knife with a 7-inch blade and sheath
1 black rubber-handled knife with 9.5-inch blade and sheath
1 white and brown-handled knife with 5-inch blade and sheath
1 brown wood-handled knife with a 10.25-inch blade
1 Panther brown-handled folding knife with a 3.75 inch blade
1 small blue folding knife
Gear:1 Volcanic .22 starter pistol wth 5 live rounds and 1 expended round
Leightning L3 ear protection
Peltor ear plugs
Simmons binoculars
Uncle Mike's Sidekick nylon holster
Box for vest accessories
Leather dual magazine holder
Black leather handgun holster
High Sierra fanny pack
Numerous paper targets
1 cardboard targets
1 Bushnell sport view rifle scope
Plastic bag of miscellaneous parts
Safariland holster paperwork
Glock handgun manual
MD-20 20-round shotgun magazine manual
MD Arms V-Plug guide
Bushmaster XM15 and C15 instruction manual
Savage Arms bolt-action rifle manual
Glock paperwork
Miscellaneous:Adam Lanza's National Rifle Association certificate
Nancy Lanza's NRA certificate
Three photographs with images of what appears to be a deceased human covered with plastic and what appears to be blood
Holiday card with a check from Nancy Lanza to Adam Lanza for purchase of C183 firearm
1 digital print of a child and various firearms
1 military-style uniform
Handwritten notes with addresses of local gun shops
Receipts and emails documenting firearm and ammunition supplies
Blue folder labeled “guns” with receipts and paperwork
Paperwork titled "Connecticut Gun Exchange Glock 20SF 10mm" dated 12-21-11
Sandy Hook report card for Adam Lanza
New York Times article on a 2008 shooting at Northern Illinois Unversity
Books: “Look me in the Eye: My Life with Asperger’s;” “Born on a Blue Day: Inside the Mind of an Autistic Savant;” “NRA Guide to Basics of Pistol Shooting;” “Train Your Brain to Get Happy”
1 Seagate Barracuda 500gb hard drive, damaged
1 custom-built desktop computer, no hard drive
1 Microsoft Xbox with partially obliterated serial number
One cotton swab of blood-like substance
1 tan sheet with blood-like substance
1 tan fitted sheet with blood-like substance
1 striped towel with blood-like substance
http://usnews.nbcnews.com/_news/2013/03/28/17501802-guns-knives-ammo-and-gear-adam-lanzas-arsenal-item-by-item?lite